干旱区生态环境知识资源中心(Arid): 放牧对短花针茅荒漠草原建群种与土壤团聚体特征的影响

Arid

	放牧对短花针茅荒漠草原建群种与土壤团聚体特征的影响
其他题名	Effects of Grazing on Edificators and Soil Aggregate Characteristics in Stipa breviflora Desert Steppe
	刘文亭 1; 王天乐 1; 张爽 1; 丁莉君 1; 吕世杰 2; 卫智军1
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2017
卷号	26 期号:6 页码:978-984
中文摘要	以内蒙古农业大学苏尼特右旗荒漠草原的放牧调控实验为平台,通过分析荒漠草原建群种种群结构及土壤团聚体特征,揭示放牧调控下荒漠草原短花针茅(Stipa breviflora)与沉积土壤的潜在联系。结果显示:(1)短花针茅幼龄与成年植株密度显著大于幼苗、老龄前期、老龄期密度;各年龄短花针茅种群密度、生物量均呈现重度放牧处理最高、适度放牧次之、重度放牧最低的规律;(2)短花针茅荒漠草原土壤团聚体分布受团聚体粒径及其与放牧强度的交互作用影响(P<0.05);同一放牧处理中,100~250 mum植物沉积团聚体含量最高,<50 mum与50~100 mum团聚体含量次之、>500 mum团聚体含量最小;而裸地土壤团聚体以<50 mum团聚体含量最高;(3)<50 mum裸地土壤团聚体含量与<50 mum植物沉积土壤团聚体含量呈正相关(P<0.05),而<50 mum植物沉积土壤团聚体含量与各年龄短花针茅种群密度、生物量呈负相关,各>100 mum植物沉积土壤团聚体含量与各年龄短花针茅种群密度、生物量呈正相关。研究认为,放牧降低了各年龄短花针茅种群密度和生物量,削弱了荒漠草地抵抗风蚀和沉降风沙的能力,降低了短花针茅改善基部土壤结构的生态功能,这可能是放牧草地退化过程的重要机制之一。
英文摘要	Based on the grazing control experiment of desert grassland in Sonid Right Banner of Inner Mongolia Agricultural University, this paper analyzed the edificator structure and soil aggregates of desert grassland, to reveal the potential relationship between Stipa breviflora and sedimentary soil. The results showed that: The density of juvenile and adult plants of S. brevifolia was significantly higher than that of seedlings, presenile and old age. The densities and standing crop of S. brevifolia were the highest in heavy grazing, followed by moderate grazing and the no grazing(P<0.05). The distribution of aggregates in Stipa desert grassland was affected by the size of aggregates and the interaction with grazing patterns. In the same grazing treatment, the distribution value of botanical sedimentary aggregates of 100~250 mum was the highest, and the distribution value of <50 mum and 50~100 mum aggregates was second, and the aggregate of >500 mum was the smallest. The distribution of bare land soil aggregates showed that the distribution of <50 mum was the highest(P<0.05). The distribution of <50 mum in bare land was significantly positively related to botanical sedimentary of <50 mum. And characteristic of each age stage S. brevifolia was negatively correlated with botanical sedimentary soil aggregates in <50 mum. The soil aggregates of >100 m plants were positively correlated with the characteristics of S. brevifolia. It is suggested that grazing decreased S. breviflora population density and biomass in each age, weakened the ability of resisting wind erosion and deposition of sandy in desert grassland, reduced the ecological function of soil structure of improving S. breviflora. It may be one of the important mechanisms for the degradation of grazing grassland.
中文关键词	短花针茅 ; 种群年龄 ; 土壤团聚体 ; 放牧调控 ; 荒漠草原
英文关键词	Stipa breviflora population age soil aggregates grazing desert grassland
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6045886
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236408
作者单位	1.内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010019, 中国; 2.内蒙古农业大学理学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	刘文亭,王天乐,张爽,等. 放牧对短花针茅荒漠草原建群种与土壤团聚体特征的影响[J]. 内蒙古农业大学,2017,26(6):978-984.
APA	刘文亭,王天乐,张爽,丁莉君,吕世杰,&卫智军.(2017).放牧对短花针茅荒漠草原建群种与土壤团聚体特征的影响.生态环境学报,26(6),978-984.
MLA	刘文亭,et al."放牧对短花针茅荒漠草原建群种与土壤团聚体特征的影响".生态环境学报 26.6(2017):978-984.